Finite element method computer programs were used to calculate the temperature rise, transient temperature change, and resulting thermal strains during simulated construction of Martins Fork Dam. The investigation was conducted in two phases. Phase I, involving temperature calculations only, was performed to provide temperature rise data upon which to base a revised maximum allowable concrete placement temperature that would reduce the potential for thermal cracking. Phase II was conducted after aggregate sources were selected to verify the placement temperatures selected in Phase I. Thermal properties of the concrete used as input to the temperature calculation program were modified as dictated by the results of thermal diffusivity tests of aggregate samples and because of increased heat of hydration from the cement accepted for Martins Fork Dam. Computer temperature simulations used the revised thermal properties and new maximum placement temperatures. Results showed that when exposed to normal ambient temperatures, surface tensile strains reached 34 percent of estimated tensile strain capacity.